JP2011013417A5 - Image forming apparatus and method of controlling image forming apparatus - Google Patents
Image forming apparatus and method of controlling image forming apparatus Download PDFInfo
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本発明は、像担持体に担持されたトナー像をシートに形成する画像形成装置および画像形成装置の制御方法に関する。 The present invention relates to an image forming apparatus for forming a toner image carried on an image carrier on a sheet and a control method for the image forming apparatus .
そこで、本発明は、検知用のトナー像が担持された像担持体上の位置からの反射光を検出した結果に基づいて検知用のトナー像の濃度を算出する際のダウンタイムを抑制することができる画像形成装置および画像形成装置の制御方法を提供することを目的とする。 Therefore, the present invention suppresses downtime when calculating the density of the detection toner image based on the result of detecting the reflected light from the position on the image carrier on which the detection toner image is carried. An object of the present invention is to provide an image forming apparatus and a control method for the image forming apparatus .
上記目的を達成するために、本発明の画像形成装置は、回転駆動される像担持体と、前記像担持体にトナー像を形成し、前記像担持体上のトナー像をシートに転写することで、シート上にトナー像を形成する像形成手段と、前記像形成手段によって前記像担持体上に検知用トナー像を形成させる制御手段と、前記像担持体に向けて光を照射する発光部と、前記発光部を発光させることで、前記像担持体からの反射光と、前記像担持体上に形成された前記検知用トナー像からの反射光とを受光する受光部を有し、前記受光部に受光される反射光量を検出する光検出手段と、前記像担持体の回転方向における前記像担持体の一周未満でトナー像が形成されていない領域からの反射光量と前記像担持体の回転方向における前記像担持体の一周に亘る反射光量とでパターンマッチングを行うことにより前記像担持体の回転方向における前記領域の位置を特定し、前記特定された前記領域の位置と、前記領域と前記検知用トナー像が形成されるべき位置との予め決められた位置関係とに基づき、前記検知用トナー像が形成されるべき位置における前記像担持体からの反射光量を特定する特定手段と、前記特定手段により特定される前記位置における前記像担持体からの反射光量と、前記光検出手段により検出される前記検知用トナー像からの反射光量とに基づき、前記検知用トナー像の濃度を決定する濃度決定手段と、を有することを特徴とする。 In order to achieve the above object, an image forming apparatus of the present invention forms a toner image on a rotationally driven image carrier, the image carrier, and transfers the toner image on the image carrier to a sheet. An image forming unit that forms a toner image on a sheet, a control unit that forms a detection toner image on the image carrier by the image forming unit, and a light emitting unit that emits light toward the image carrier And a light receiving unit that receives reflected light from the image carrier and reflected light from the detection toner image formed on the image carrier by causing the light emitting unit to emit light, and A light detecting means for detecting the amount of reflected light received by the light receiving portion; and the amount of reflected light from an area where a toner image is not formed in less than one turn of the image carrier in the rotation direction of the image carrier; Over one rotation of the image carrier in the rotation direction The position of the area in the rotation direction of the image carrier is specified by performing pattern matching with the amount of incident light, and the position of the specified area and the position where the area and the detection toner image are to be formed And specifying means for specifying the amount of reflected light from the image carrier at the position where the detection toner image is to be formed, and the position at the position specified by the specifying means. Density determining means for determining the density of the detection toner image based on the amount of reflected light from the image carrier and the amount of reflected light from the detection toner image detected by the light detection means; And
本発明によれば、検知用のトナー像が担持された像担持体上の位置からの反射光を検出した結果に基づいて検知用のトナー像の濃度を算出する際のダウンタイムを抑制することができる。 According to the present invention, it is possible to suppress downtime when calculating the density of the detection toner image based on the result of detecting the reflected light from the position on the image carrier on which the detection toner image is carried. Can do.
本発明の画像形成装置および画像形成装置の制御方法の実施の形態について図面を参照しながら説明する。 Embodiments of an image forming apparatus and an image forming apparatus control method according to the present invention will be described with reference to the drawings.
Claims (8)
前記像担持体にトナー像を形成し、前記像担持体上のトナー像をシートに転写することで、シート上にトナー像を形成する像形成手段と、
前記像形成手段によって前記像担持体上に検知用トナー像を形成させる制御手段と、
前記像担持体に向けて光を照射する発光部と、前記発光部を発光させることで、前記像担持体からの反射光と、前記像担持体上に形成された前記検知用トナー像からの反射光とを受光する受光部を有し、前記受光部に受光される反射光量を検出する光検出手段と、
前記像担持体の回転方向における前記像担持体の一周未満でトナー像が形成されていない領域からの反射光量と前記像担持体の回転方向における前記像担持体の一周に亘る反射光量とでパターンマッチングを行うことにより前記像担持体の回転方向における前記領域の位置を特定し、前記特定された前記領域の位置と、前記領域と前記検知用トナー像が形成されるべき位置との予め決められた位置関係とに基づき、前記検知用トナー像が形成されるべき位置における前記像担持体からの反射光量を特定する特定手段と、
前記特定手段により特定される前記検知用のトナー像が形成されるべき位置における前記像担持体からの反射光量と、前記光検出手段により検出される前記検知用トナー像からの反射光量とに基づき、前記検知用トナー像の濃度を決定する濃度決定手段と、を有することを特徴とする画像形成装置。 A rotationally driven image carrier;
The door toner image formed on the image bearing member, by transferring the toner image on the image bearing member onto a sheet, an image forming means for forming a toner image on a sheet,
Control means for forming a toner image for detection on the image carrier by the image forming means;
A light emitting unit that emits light toward the image carrier, and a light emitted from the light emitting unit, so that the reflected light from the image carrier and the detection toner image formed on the image carrier A light detecting unit that receives the reflected light and detects the amount of reflected light received by the light receiving unit ;
In the reflected light amount over one round of the image bearing member in the rotational direction of said image bearing member and the amount of reflected light from areas not toner image is formed in less than one revolution of the image bearing member in the rotational direction before Kizo carrier The position of the area in the rotation direction of the image carrier is specified by performing pattern matching, and the position of the specified area and the position where the area and the detection toner image are to be formed are determined in advance. A specifying means for specifying a reflected light amount from the image carrier at a position where the detection toner image is to be formed, based on the positional relationship,
Based on the amount of reflected light from the image carrier at the position where the detection toner image specified by the specifying unit is to be formed and the amount of reflected light from the detection toner image detected by the light detecting unit. an image forming apparatus characterized by having a concentration determining means for determining the concentration of the detection toner image.
前記特定手段は、前記第１の反射光量と前記発光部を前記第１の発光量で発光させたときに前記光検出手段により検出される前記領域からの反射光量とに基づき前記パターンマッチングを行い、前記パターンマッチングを行った結果と、前記第２の反射光量と、前記位置関係とに基づき、前記第２の反射光量の内、前記検知用トナー像が形成されるべき位置における前記像担持体からの反射光量を特定することを特徴とする請求項１又は２に記載の画像形成装置。 The amount of reflected light over the entire circumference of the image carrier in the rotation direction of the image carrier includes the first reflected light amount detected by the light detection means when the light emitting unit emits light with the first light emission amount. The second reflected light amount detected by the light detection means when the light emitting unit emits light with a second light emission amount smaller than the first light emission amount,
The specifying unit performs the pattern matching based on the first reflected light amount and the reflected light amount from the region detected by the light detection unit when the light emitting unit emits light with the first light emission amount. The image carrier at a position where the detection toner image is to be formed in the second reflected light amount based on the result of the pattern matching, the second reflected light amount, and the positional relationship. the image forming apparatus according to claim 1 or 2, characterized in that to identify the amount of reflected light from.
前記像担持体の回転方向における前記像担持体の一周に亘る反射光量には、前記増幅部を第１の出力ゲインに設定したときに前記光検出手段により検出された第１の反射光量と、前記増幅部を前記第１の出力ゲインよりも低い第２の出力ゲインに設定したときに前記光検出手段により検出された第２の反射光量とがあり、
前記特定手段は、前記第１の反射光量と前記増幅部を前記第１の出力ゲインに設定したときに前記光検出手段により検出される前記領域からの反射光量とに基づき前記パターンマッチングを行い、前記パターンマッチングを行った結果と、前記第２の反射光量と、前記位置関係とに基づき、前記第２の反射光量の内、前記検知用トナー像が形成されるべき位置における前記像担持体からの反射光量を特定することを特徴とする請求項１又は２に記載の画像形成装置。 The light detection means includes an amplification unit that amplifies the amount of reflected light received by the light receiving unit,
The amount of reflected light over the circumference of the image carrier in the rotation direction of the image carrier includes a first reflected light amount detected by the light detection means when the amplification unit is set to a first output gain, and A second reflected light amount detected by the light detection means when the amplification unit is set to a second output gain lower than the first output gain;
The specifying unit performs the pattern matching based on the first reflected light amount and the reflected light amount from the region detected by the light detection unit when the amplification unit is set to the first output gain. Based on the result of the pattern matching, the second reflected light amount, and the positional relationship, from the image carrier at the position where the detection toner image is to be formed in the second reflected light amount. the image forming apparatus according to claim 1 or 2, characterized in that to identify the amount of reflected light.
前記像担持体の回転方向における前記像担持体の一周未満でトナー像が形成されていない領域からの反射光量と前記像担持体の回転方向における前記像担持体の一周に亘る反射光量とでパターンマッチングを行うことにより前記像担持体の回転方向における前記領域の位置を特定し、前記特定された前記領域の位置と、前記領域と前記検知用トナー像が形成されるべき位置との予め決められた位置関係とに基づき、前記検知用トナー像が形成されるべき位置における前記像担持体からの反射光量を特定する特定ステップと、
前記特定ステップにより特定される前記検知用のトナー像が形成されるべき位置における前記像担持体からの反射光量と、前記光検出手段により検出される前記検知用トナー像からの反射光量とに基づき、前記検知用トナー像の濃度を決定する濃度決定ステップと、
を有することを特徴とする画像形成装置の制御方法。 An image carrier that is driven to rotate; an image forming unit that forms a toner image on the image carrier; and a toner image on the sheet by transferring the toner image on the image carrier to the sheet; and A control unit that forms a detection toner image on the image carrier by an image forming unit, a light emitting unit that irradiates light toward the image carrier, and a light emitting unit that emits light. A light receiving unit that receives the reflected light from the detection toner image formed on the image carrier, and a light detection unit that detects the amount of reflected light received by the light receiving unit. An image forming apparatus control method comprising:
A pattern with a reflected light amount from a region where a toner image is not formed in less than one turn of the image carrier in the rotation direction of the image carrier and a reflected light amount over one turn of the image carrier in the rotation direction of the image carrier. The position of the area in the rotation direction of the image carrier is specified by performing matching, and the position of the specified area and the position where the area and the detection toner image are to be formed are determined in advance. A specific step of specifying a reflected light amount from the image carrier at a position where the detection toner image is to be formed based on the positional relationship;
Based on the reflected light amount from the image carrier at the position where the detection toner image specified by the specifying step is to be formed and the reflected light amount from the detection toner image detected by the light detection means. A density determination step for determining the density of the detection toner image;
Control method for an image forming apparatus characterized by having a.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009156770A JP5344601B2 (en) | 2009-07-01 | 2009-07-01 | Image forming apparatus and method of controlling image forming apparatus |
| US12/825,927 US8218989B2 (en) | 2009-07-01 | 2010-06-29 | Image forming apparatus that transfers toner image carried by image carrier onto sheet, density control method therefor, and storage medium |
| EP10168104A EP2287680A1 (en) | 2009-07-01 | 2010-07-01 | Image forming apparatus that transfers toner image carried by image carrier onto sheet, density control method therefor, and computer program |
| CN201010220881XA CN101943876B (en) | 2009-07-01 | 2010-07-01 | Image forming apparatus and density control method therefor |
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| JP2009156770A JP5344601B2 (en) | 2009-07-01 | 2009-07-01 | Image forming apparatus and method of controlling image forming apparatus |
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| JP2011013417A JP2011013417A (en) | 2011-01-20 |
| JP2011013417A5 true JP2011013417A5 (en) | 2012-08-16 |
| JP5344601B2 JP5344601B2 (en) | 2013-11-20 |
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| US (1) | US8218989B2 (en) |
| EP (1) | EP2287680A1 (en) |
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| CN (1) | CN101943876B (en) |
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| JP5504909B2 (en) * | 2010-01-21 | 2014-05-28 | 株式会社リコー | Image processing apparatus, image processing method, program, and recording medium |
| JP5549370B2 (en) * | 2010-05-14 | 2014-07-16 | コニカミノルタ株式会社 | Image forming apparatus |
| JP6046945B2 (en) * | 2011-08-31 | 2016-12-21 | キヤノン株式会社 | Image forming apparatus |
| JP5959905B2 (en) * | 2012-04-10 | 2016-08-02 | キヤノン株式会社 | Image forming apparatus |
| US9049313B2 (en) * | 2012-12-19 | 2015-06-02 | Canon Kabushiki Kaisha | Image forming apparatus that controls image formation condition |
| JP6225456B2 (en) * | 2013-04-03 | 2017-11-08 | コニカミノルタ株式会社 | Image forming apparatus |
| JP5894962B2 (en) * | 2013-04-26 | 2016-03-30 | 株式会社沖データ | Image forming apparatus and method of controlling image forming apparatus |
| US11026765B2 (en) | 2013-07-10 | 2021-06-08 | H2O Tech, Inc. | Stabilized, water-jet slurry apparatus and method |
| JP6192615B2 (en) * | 2013-08-30 | 2017-09-06 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus and image forming method |
| JP6078038B2 (en) * | 2014-10-31 | 2017-02-08 | 株式会社Pfu | Image processing apparatus, image processing method, and program |
| WO2016116131A1 (en) | 2015-01-19 | 2016-07-28 | Hewlett-Packard Indigo B.V. | Printing methods |
| WO2016116129A1 (en) | 2015-01-19 | 2016-07-28 | Hewlett-Packard Indigo B.V. | Primer composition and method |
| WO2016116130A1 (en) | 2015-01-19 | 2016-07-28 | Hewlett-Packard Indigo B.V. | Liquid electrophotographic composition |
| JP6451398B2 (en) * | 2015-02-24 | 2019-01-16 | 富士ゼロックス株式会社 | Correction device and output device |
| JP6525210B2 (en) * | 2016-07-01 | 2019-06-05 | 京セラドキュメントソリューションズ株式会社 | Image forming device |
| US10866555B2 (en) * | 2017-01-19 | 2020-12-15 | Canon Kabushiki Kaisha | Image forming apparatus capable of detecting sheet |
| JP2019028246A (en) * | 2017-07-31 | 2019-02-21 | キヤノン株式会社 | Image forming apparatus |
| JP7259434B2 (en) * | 2019-03-18 | 2023-04-18 | 富士フイルムビジネスイノベーション株式会社 | Document feeding device and image forming device |
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| JP3694980B2 (en) * | 1996-06-11 | 2005-09-14 | 松下電器産業株式会社 | Image forming apparatus |
| JP3693168B2 (en) * | 2002-01-31 | 2005-09-07 | 横河電機株式会社 | Displacement measuring method and displacement measuring apparatus using the same |
| US6889015B2 (en) * | 2002-07-29 | 2005-05-03 | Seiko Epson Corporation | Apparatus and method of forming patch image for optimizing density control factor |
| US6871026B2 (en) * | 2002-08-22 | 2005-03-22 | Seiko Epson Corporation | Apparatus for and method of forming image under controlled image forming condition |
| JP2004198674A (en) * | 2002-12-18 | 2004-07-15 | Seiko Epson Corp | Image forming apparatus |
| JP2005148299A (en) * | 2003-11-13 | 2005-06-09 | Kyocera Mita Corp | Image density adjustment method and device for image forming apparatus |
| JP2005345740A (en) | 2004-06-02 | 2005-12-15 | Canon Inc | Image forming apparatus and toner concentration adjustment method therefor |
| JP4541851B2 (en) * | 2004-11-25 | 2010-09-08 | キヤノン株式会社 | Test pattern measuring method and image forming apparatus |
| JP4689292B2 (en) * | 2005-02-09 | 2011-05-25 | 株式会社リコー | Image forming apparatus and image forming method |
| JP4850651B2 (en) * | 2006-10-12 | 2012-01-11 | キヤノン株式会社 | Image forming apparatus |
| JP5339689B2 (en) * | 2007-05-21 | 2013-11-13 | キヤノン株式会社 | Image forming apparatus and control method thereof |
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- 2010-07-01 CN CN201010220881XA patent/CN101943876B/en not_active Expired - Fee Related
- 2010-07-01 EP EP10168104A patent/EP2287680A1/en not_active Withdrawn
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